Questions tagged [high-voltage]
Questions related to the design of circuits that supply or use a high voltage. There are a few definitions but the IEC definition of a high-voltage supply system is above 1000 Vrms AC or 1500 V DC.
195
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Simple, compact 9V DC to 400V DC step up
I'm attempting to create my own Geiger-Muller counter based on an old, soviet STS-5 tube.
I want it to be as compact as possible. I don't want to use ready-made modules, like this one, instead I ...
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High voltage power supply polarity for X-ray tube application
High voltage power supplies (HVPS) in the range 100 to 200 kV are used for working with X-ray tube. Some HVPS produce negative output voltage or even bipolar output including negative and positive ...
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Enclosure/boxes for high voltage PCB
It is time to choose the proper enclosure for a high voltage PCB. We will need to do holes for LV external connectors and external connectors for high voltage wires. I was looking for standard boxes ...
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How to insulate a high voltage PCB trace?
I am making a PCB with a HV power supply module. Namely the C9619 module from Hamamatsu. The module produces up to 2 mA and 4 W of power so the heat won't be a problem
The module can produce up to ...
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Battery powered ionic air pump voltage stepup
I am working on a proof-of-concept device for medical purposes, but am lacking in the electronics side of the skillset!
I am trying to build a vibration-free wearable air pump, and using an ionic ...
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How can I build a high voltage (2-6 kV), high frequency (20-50 kHz) power supply?
I need to make a high voltage (2-6 kV), high frequency (20-50 kHz) power supply in order to generate cold plasma (in argon gas.) I used a flyback circuit (found on the web.) The high frequency is ...
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EFT generator circuit
I am simulating a circuit to model the EN 61000-4-4 waveform for electrical fast transients using LTspice. The idea is to have the generator for some in house testing.
After a lot of back and fourth ...
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Current-fed Royer oscillator startup speed
I am trying to design a current-fed Royer oscillator based 5 kV supply that needs to start up fast and then decay fast. The goal is less than 100 ms for both startup and decay. The criteria are to ...
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What is the name of this huge high-power test equipment?
It seems very old, maybe more than 50 years, and it doesn't have an information plate.
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Electric shock through thick rubber tube filled with coolant and carrying a high voltage wire
I have two Litz wires coming out of a coil. The coil is driven with short pulses of 20 kHz sinosoidal voltage with a peak of 1.4kV. Each Litz wire is insulated by 3 thin layers of mylar sheets in ...
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Electrospray Deposition
I recently got a new project to work on, an Electrospray Deposition setup. Basically, it consists of a needle that contains a liquid, a electrode and a high voltage source. The needle is positioned at ...
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Tektronix P6015 Replacement Potentiometer Considerations
I’ve acquired (saved from the landfill) an old Tektronix high voltage probe, model P6015. The probe body and cable are in decent condition, but I discovered two damaged potentiometers in the ...
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ESD Capacitor Calculation, 330Ohm Series Resistor and ESD Clamp Voltage
I have a input power filter circuit.
It has ESD Protection capacitors which help to protect the downstream circuit from ESD Pulses.
ESD Capacitors Specifications :
C0001, C0002, C0003, C0004 = 47nF, ...
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How can I control the output level from a HV (220VDC) floating regulator using a DAC?
I have a 240V DC supply I want to clean up and make adjustable (150-220V) with an LR8 high voltage floating regulator.
I can't use the standard way of connecting the DAC to the adjust pin (current ...
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Fast switch rise time techniques
This question is continuation of this question: High Frequency Square Wave Generator
I am trying to drive a 400V supply and 50ohm load with an RF MOSFET which has a rise time of 3-4 ns and fall time ...
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How to ground a flyback transformer?
I designed a 50,000 volt power supply, that I am having problems with on grounding the HV side of the output. The HV appears to be injecting HV into my logic sections through the ground, damaging the ...
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Design considerations for large ratio step-down transformation
What are the design considerations for a system in which a high voltage and current DC soliton pulse (approximately 50kJ at 45kV over 100ms) from a capacitor bank or PFN must be stepped down to a low ...
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Switching n-MOSFET as Solid-State Relay
I'm trying to design a simple solid state relay that can be in the off state when an AC Source is applied (schematic one) and then source up to 150mA to a small resistor when that AC Source is removed ...
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Controlling 120v line with a 12v switch on a different line
I have 10a 120v power sockets in my garage that currently doesn't have any switch on it and powers some overhead lights that I have plugged in. Separate to that, I have a 12v circuit powering various ...
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Rectifying a spark coil that produces 10 kHz
I am working on a project where I want 10 to 30 kV DC (to energize two capacitors in series rated at 28 kV per capacitor). I bought a couple of 25 kV HV rectifiers (one to generate a positive voltage ...
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Cockcroft-Walton Multiplier strange voltage values
I am building a circuit that allows me to generate high DC voltages that can be used in conjunction with a 3He counter tube to detect slow neutron radiation. The circuit was designed by someone else ...
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Methods for increasing output power and efficiency of a ZVS flyback driver
I have built the following ZVS driver:
I am using this circuit at a resonance frequency of 150kHz.
My hope is to be able to modify this circuit for wireless power transmission. With that being said, ...
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Discharging high voltage and capacitance capacitor?
I need to discharge a 4.4mF (millifarads) capacitor storing 1200V in about 5 seconds. I did the t=R*C' and got a resistance value of approximately 227ohms. I did a ...
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Measuring High Voltage DC Using ESP32
I want to read high voltages, around 150VDC, using a ESP32.
I plan to put this as an input into the ESP32 ADC pin. But of course, i shouldn't have voltage that high on the input of a ESP32.
In ...
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How to control charge on a high-voltage capacitor after voltage multiplier?
Can anyone think of an electronic way to control the charge on a high-voltage capacitor that is fed by a multi-stage voltage multiplier?
I can control the charge on the way up by controlling the ...
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Circuit for high-voltage pulses using Raspberry Pi PWM to drive a piezoelectric actuator
I am trying to engineer a device to separate red blood cells from blood plasma in 100mm x 1mm capillary tubes using the Raspberry Pi GPIO pin PWM feature and a piezoelectric actuator.
The pulses ...
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High voltage 1100 V current sense on the high side
I have the circuit that you see below.
My load is a photomultiplier tube equivalent to a 3.63Mohm resistor.
My power supply can deliver max 4W (2kV and 2mA). I use it on 1100V and the load draws ~...
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55-650V to 5V DC/DC convertor design
For an application I am building I need a custom DC/DC convertor that can convert a voltage ranging from 60V-600V to a contant voltage of around 5V.
Using the TI Webench with the paramaters Vin_min = ...
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Spark minimum current
I know from the title may sounds wired. But it makes sense to me at least for my restricted knowledge of high voltages. I'm always working with low or house voltage as well as this question may refer ...
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High voltage DC offset servo
I'm working on a project and I need some assistance.
I have an audio tube amplifier output stage that I need to have adjustable operating points while maintaining a DC null at the output.
[
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MOT power supply issues
I am working on a quad MOT (microwave oven transformer) Tesla coil.
We tore apart 5 microwaves and got some MOTs. We first tested each MOT individually. They did not seem to have any problems. We then ...
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High Power H-Bridge with IR2125 Drivers Problem
I'm currently stuck on a problem when trying to drive a 140V DC motor using an H-Bridge with 4 high-power mosfets and 4 IR2125 drivers.
I'm using as input to the drivers a signal generator of 5V in ...
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How to sense if a heater is plugged and on
I want to remotely check if one of my home sockets (which happens to power a heater) is transmitting current or not. I do this as a hobby project, so my main priority is to learn through the process ...
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In a ZVS circuit, why does frequency increase when an arc forms?
In a GreatScott video, when he made an arc using a ZVS circuit, the frequency jumped from 40 kHz to around 80 kHz when the arc formed. I read that this is because the inductance is reduced because of ...
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Successful high voltage (400 V DC) measurement with isolation
I want to make a precharge system for an electric car for which I require voltage measurement.
Here is what I am doing:
Stepping the voltage down through voltage divider (0-5 V) range (high side).
...
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Amplifier for modulated 2kHz rectangular signal
I want to amplify a rectangular signal coming from a microcontroller.
It goes from -3.3V to 3.3V and has frequency of 2kHz. It is modulated with a trapezoid signal, which means the modulating signal ...
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How do I know that the isolation tester is doing its job?
I am measuring the isolation resistance of a device where the measured value is within the range of just measuring with the test probes hanging freely in open air.
1 kV gives values in gigaohm range.
...
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High-voltage resistors versus anti-surge resistors
I am making a voltage divider with four 1M 1206 thick-film resistors and a single 2.7k resistor. The input to this voltage divider will be mains line and neutral.
I want to measure the voltage at line ...
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HV Rectifier output for APD biasing
I am trying to convert low 5V or 12V to -200V using this device. Which converts it using transformer and rectifier at the output:
Can I just attach HV OUT to bias APD detectors? Or is there any ...
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Help in understanding a Capacitive Voltage Transformer
I have been reading up about CVT’s and trying to comprehend some of the parts of the typical circuit which include:
A potential divider (C1 & C2).
An inductor tapped from the potential divider.
A ...
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Suitable High Voltage source for CRT experiment
I bought a Soviet-era 'new/old stock' Cathode Ray Tube (CRT), historically intended for use in a small oscilloscope. My goal is to explore atomic diffraction (with a hack):
But as a chemist/physicist ...
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Protection from high voltage in high frequency ignition in plasma cutting machines
I am currently in the process of designing a circuit for detection of a short circuit of a plasma cutter nozzle with material when there is no arc. The important requirement is that detection ...
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How can I get different voltage inputs from a high voltage power supply?
I want to use a 5 kV DC supply to power a low-current (0.5-3.5 mA) circuit in a microfluidic device.
I would like to create two input voltages from this power supply to have a 300 V drop from 4.3 kV ...
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How to measure the waveform of a piezo igniter?
Is there a (cheap) way to measure the pulse of commercially available piezoelectric igniters like those used in lighters or BBQ grills?
I use them as a cheap (and very crude, for sure) method for ESD ...
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Making a unipolar HVPS bipolar safely
I have a Keithley 5kV power supply (2290 model) that I use for high energy physics experiment. It has resolution of 1V and current resolution of 1uA. The range that it offers is +0V to +5000V via its ...
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Resonant Transformer / Resonant Inductive Coupling
I´m trying to build a resonant transformer (or a resonant inductive coupler, I don´t know if the names fit to the topology I´m showing, anyway). The idea is to develop a high voltage on a capacitor. ...
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2.5 kV Low Frequency Switching Circuit
I am working on designing a circuit to generate and switch a 2.5kV and -2.5kV power supply to generate a high voltage square wave. The intent is to generate an electrostatic field between two ...
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Low pass filter symmetry
I wanted to know which one of these circuits would be better to protect the transformer.
The low pass filters are used as protection to block the high high frequency from the resonant circuit as the ...
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Howto: RF HV power supply (13,56 MHz, ~30 kV - 50 kV, 1 kW - 3 kW)
I hope you can help me on this one.
Short recap about me, I am a maker and I had a vocational education some 30 years ago as engineer in HV (up to 48kV) in industrial facilities. So I am aware of the ...
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What is the most effective way to prevent electrical arcs across resistors?
When building any kind of ultra high voltage boost circuit or transformer, the high voltage will often arc between components if the voltage is high enough and the distance between them is short ...